On frequency quantization in sinusoidal audio coding
2005 (English)In: IEEE Signal Processing Letters, ISSN 1070-9908, E-ISSN 1558-2361, Vol. 12, no 3, 210-213 p.Article in journal (Refereed) Published
In this work, we develop a new method for jointly optimal quantization of sinusoidal frequencies, amplitudes, and phases and apply the method to sinusoidal audio coding. This is an extension of an earlier work on quantization of sinusoidal amplitudes and phases to frequencies. The optimization is performed for a set of sinusoids that models a short segment of an audio signal. For a given bit-rate constraint, the optimal quantizers minimize a single-letter weighted distortion measure that accounts for perceptual importance of sinusoids. The quantizers are derived analytically using high-rate theory. The method yields high performance and has a number of practical advantages over conventional sinusoidal quantization methods.
Place, publisher, year, edition, pages
2005. Vol. 12, no 3, 210-213 p.
audio coding, high-rate theory, quantization, sinusoidal coding
IdentifiersURN: urn:nbn:se:kth:diva-14545DOI: 10.1109/lsp.2004.842260ISI: 000227130500011ScopusID: 2-s2.0-14644390904OAI: oai:DiVA.org:kth-14545DiVA: diva2:332586
QC 201005252010-08-052010-08-05Bibliographically approved